TY JOUR TI ECOLOGICAL MONITORING OF FISH FAUNA OF KAZAKHSTAN SECTOR OF THE CASPIAN SEA FOR OIL AND HEAVY METAL CONTAMINATION KW petroleum hydrocarbons KW heavy metals KW the muscle tissues of fish KW pollutants JO Bulletin of KSAU AU Suyunova, A.B. AU Zabolotnykh, M.V. PY 2016 IS PB Krasnoyarsk State Agrarian University